code: def join(split_command: List[str]) -> str:
      """Return a shell-escaped string from *split_command*."""
      return " ".join(shlex.quote(arg) for arg in split_command)
  
imports: import asyncio
  import logging
  import os
  import shlex
  import subprocess
  import sys
  import threading
  from typing import TYPE_CHECKING, Any, Dict, List, Optional
  import wandb
  from wandb.sdk.launch.environment.abstract import AbstractEnvironment
  from wandb.sdk.launch.registry.abstract import AbstractRegistry
  from .._project_spec import LaunchProject
  from ..builder.build import get_env_vars_dict
  from ..errors import LaunchError
  from ..utils import LOG_PREFIX, MAX_ENV_LENGTHS, PROJECT_SYNCHRONOUS, _is_wandb_dev_uri, _is_wandb_local_uri, docker_image_exists, event_loop_thread_exec, pull_docker_image, sanitize_wandb_api_key
  from .abstract import AbstractRun, AbstractRunner, Status
label_desc: Use image node_id 4 for calling a global function with example usage: join(split_command) and returns: str